载银TiO_2纳米管阵列的制备及性能（英文）

Synthesis and Characterization of TiO_2 Nanotube Arrays with Ag Nanoparticles

为了增加生物医用钛及其合金的生物活性和其他特殊功能，对钛合金表面进行改性和功能化。采用阳极氧化法在钛合金表面制备出Ti02纳米管阵列，再用真空浸渍法制备载银Ti02纳米管阵列；研究了载银TiOz纳米管阵列的抗菌作用。结果表明：阳极氧化法使钛合金表面形成高度整齐的Ti02纳米管阵列，其管径为150-200nm，管长为400-500nm，管壁厚为20m，且纳米银颗粒沉积在纳米管的管口及管壁上，其粒径约为10-20nm。在磷酸盐缓冲液中，银离子释放时间至少能够持续13d。该载银TiOz纳米管阵列对金黄葡萄球菌和大肠杆菌具有一定的抑制作用。

In order to improve the biological activity and other properties of biomedical titanium alloy, the surface modification and functionalization of titanium alloy were carried out. The Tigh nanotube arrays were fabricated via electro-chemical anodiza- tion, and the Ag nanoparticles were loaded on TiO2 nanotube via vacuum impregnation. The antibacterial ability of the Ag nan- oparticles e loaded on TiO2 nanotube arrays was investigated. The results show that the nanotubes prepared by anodization are highly-ordered, and the size of TiO2-TNs is 150-200 nm in diameter and 400-500 nm in length, and the wall thickness is 20 nm. The Ag nanoparticles are attached to the mouths and walls of the nanotubes, and the size of Ag nanoparticles is 10-20 nra Ag in phosphate buffered saline can be released for 13 days at least. The coatings have an appropriate antibacterial ability to Escherichia coli and Sta phulococcus aureus.